Effects of rare earth Ce on TiN inclusion modifications in 20CrMnTi steel under deoxygenation conditions of Si–Ca–Ba alloy

Shuang Liu; Fan Yang; Lixia Liu; Jian Wang; Jun Peng; Fang Zhang; Shengli An

Journal of Materials Research and Technology (May 2024)

Effects of rare earth Ce on TiN inclusion modifications in 20CrMnTi steel under deoxygenation conditions of Si–Ca–Ba alloy

Shuang Liu,
Fan Yang,
Lixia Liu,
Jian Wang,
Jun Peng,
Fang Zhang,
Shengli An

Affiliations

Shuang Liu: School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Inner Mongolia University of Science and Technology, Ministry of Education, Baotou, 014010, China
Fan Yang: School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Inner Mongolia University of Science and Technology, Ministry of Education, Baotou, 014010, China
Lixia Liu: School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Inner Mongolia University of Science and Technology, Ministry of Education, Baotou, 014010, China
Jian Wang: School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Inner Mongolia University of Science and Technology, Ministry of Education, Baotou, 014010, China
Jun Peng: School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Inner Mongolia University of Science and Technology, Ministry of Education, Baotou, 014010, China; Corresponding author. School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China.
Fang Zhang: School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Inner Mongolia University of Science and Technology, Ministry of Education, Baotou, 014010, China; Corresponding author. School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China.
Shengli An: School of Rare Earth Research and Development, Inner Mongolia University of Science and Technology, Baotou, 014010, China; School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Inner Mongolia University of Science and Technology, Ministry of Education, Baotou, 014010, China

Journal volume & issue: Vol. 30
pp. 223 – 230

Abstract

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20CrMnTi steel is widely used in the gear manufacturing field of engineering machinery. The addition of Ti element to steel can effectively improve its low-temperature impact toughness and enhance its mechanical properties. However, during the smelting process of 20CrMnTi, large-sized TiN inclusions are inevitably formed in the steel, which affects its service performance improvement. This paper focuses on the directional modification behaviors of TiN inclusions in 20CrMnTi gear steel by rare earth Ce under deoxygenation conditions of Si–Ca–Ba alloy. The results show that under the deoxygenation conditions of Si–Ca–Ba alone, there are composite inclusions in 20CrMnTi steel with CaAl12O19 as the core and TiN wrapped around the periphery, all of which have sizes greater than 2 μm. This type of inclusion is square or diamond shaped, and the addition of Si–Ca–Ba deoxygenation alone has poor TiN modification effect on gear steel 20CrMnTi. Adding Ce element can effectively improve the nucleation core of inclusions. The CeAlO3–TiN and (CaAl12O19–Ba–Ce)–TiN composite inclusions are formed, and the TiN inclusions are modified in terms of morphology and size. The average size of inclusions decreases from 4.1 to 3.0 μm, which prevented the excessive growth of pure TiN inclusions to some extent.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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